JP2006019906A - Folding portable wireless unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a portable wireless unit in which antenna performance is improved when the holding state is varied under closed state. <P>SOLUTION: The folding portable wireless unit employing a bendable planar connection member for coupling two cases comprises a section for detecting the overlapping state of two cases under closed state and delivering a state output signal corresponding to that state, and a section for switching a matching circuit being connected between a wireless circuit section and an antenna based on the output signal from the detecting section. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an antenna configuration when a state of a foldable portable wireless device is changed in a closed state in a foldable portable wireless device using a planar connection member in a structure that realizes opening and closing of a casing.

  In a mobile radio that is assumed to be used in various environments, the antenna performance changes or deteriorates greatly depending on the state in the vicinity of the antenna in the environment.

  Factors that greatly affect antenna performance are: 1. Effects due to human proximity 2. 2. Effect of proximity to metal There are three points of influences due to changes in the structural state of the portable radio, and how to reduce these influences is a problem in antenna design in mobile radios.

  Conventionally, the following two approaches are taken for the above problems. The first is a method of switching the matching circuit of the antenna according to a change in the state of the mobile radio, and the second is a method of switching the antenna itself to be used according to a change in the state of the mobile radio.

  Regarding the first method, for example, as shown in Patent Document 1, a configuration is proposed in which a state where a wireless device is held by a human body is detected by a touch sensor or the like, and an antenna matching circuit is switched based on the result. ing. Patent Document 2 proposes a configuration in which an open state and a closed state of a foldable portable wireless device are detected and an antenna matching circuit corresponding to the state is selected.

  Regarding the second method, for example, as shown in Patent Document 3, the antenna itself is switched between a case where it is used while being held by a human body and a case where it is connected to a PC or the like and used for data communication. A configuration is proposed.

JP 2001-217624 A JP 2003-158463 A JP 2000-022609 A

  However, the configuration of the portable wireless device is a configuration that switches to an optimum matching circuit for the open state and the closed state of the folding portable wireless device, and is matched when the holding state changes in the closed state. It is not assumed that the circuit will be optimized. In addition, regarding the configuration including a plurality of antennas, when the holding state changes in the closed state, the positional relationship between each antenna and the substrate that is the ground conductor changes, and thus the antenna characteristics change and deteriorate. There is a problem that the mounting area of the antenna and the cost increase.

  The present invention solves such problems, and an object thereof is to improve the antenna performance when the holding state changes in the closed state without using a plurality of antennas.

  A foldable portable wireless device according to the present invention is arranged in a first casing, a second casing, a first circuit board disposed in the first casing, and a second casing. A first state in which the second circuit board, the first casing and the second casing are mechanically connected, and the first casing and the second casing are overlapped; A planar connection member that can be bent so as to be opened and closed in a second state in which the casing and the second casing are separated from each other, and a first circuit disposed substantially along the planar connection member A flexible connection conductor for electrically connecting the board and the second circuit board, a radio circuit unit provided on the second circuit board, and a radio circuit unit arranged substantially along the planar connection member And an antenna connected via a feeder line. Furthermore, the foldable portable radio device according to the present invention includes a plurality of matching circuits that are selectively connected between the radio circuit unit and the antenna, and at least the first casing and the second casing in the first state. A detection unit that outputs a state output signal corresponding to the overlapping state, and a switching unit that switches a matching circuit connected between the wireless circuit unit and the antenna based on the state output signal of the detection unit.

  In the above-described configuration, the planar connecting member is deformed, and the overlapping state of the first casing and the second casing is changed by the deformation of the planar connecting member.

The detection unit includes a first detection sheet metal disposed on the first circuit board and a second detection sheet metal disposed on the second circuit board, the first detection sheet metal and the second detection sheet metal It is good also as a structure which outputs a status output signal based on the electrostatic capacitance between detection sheet metals.
Further, in this case, the first detection sheet metal is disposed in a region adjacent to the planar connection member of the first circuit board, and the second detection sheet metal is adjacent to the planar connection member of the second circuit board. It can be set as the structure arrange | positioned in the area | region.

  Moreover, the said detection part is arrange | positioned on the 1st sensing element and 2nd sensing element which were arrange | positioned on the 1st circuit board, and the 2nd circuit board, and the 1st sensing element and the 2nd sensing element Including a first signal output element and a second signal output element for outputting a signal corresponding to a relative position with respect to the element, based on outputs of the first signal output element and the second signal output element, Can also be configured.

  In the above configuration, the first sensing element is disposed in a region adjacent to the on-plane connection member of the first circuit board, and the second detection element is adjacent to the planar connection member of the first circuit board. The first signal output element is disposed in a region adjacent to the planar connection member of the second circuit board, and the second signal output element is disposed on the second circuit board. It is good also as a structure arrange | positioned at the edge part on the opposite side to the edge part adjacent to this planar connection member.

  The first state in which the first housing and the second housing are overlapped means a state in which the folding radio device is closed. Further, the second state in which the first housing and the second housing are separated refers to a state in which the foldable wireless device is opened.

  In the above description, the first casing and the second casing can be either an upper casing or a lower casing.

  As described above, according to the present invention, in the folding portable wireless device using the planar connecting member in the structure that realizes opening and closing of the housing, the holding state in the closed state (first state) is This has the effect of improving the antenna performance when changed.

  Hereinafter, embodiments of the present invention will be described with reference to FIGS.

(First embodiment)
A foldable portable wireless device according to a first embodiment will be described with reference to FIGS.

  As shown in FIG. 1, the foldable portable wireless device according to the first embodiment of the present invention includes a first housing (upper housing) 11, a second housing (lower housing) 12, It has the connection part 13 which connects the 1st and 2nd housing | casing. A connecting portion 13 made of a planar connecting member that can be bent can open and close both housings 11 and 12. In FIG. 1, the first housing 11 and the second housing 12 are in a separated state.

  The first housing 11 is provided with a display unit 21 including a liquid crystal display device, a receiver 22, and the like. The second housing 12 includes an operation unit 23 having a plurality of operation key buttons, a microphone 24, and the like, and a wireless circuit, a control circuit, an information processing circuit, and the like are provided therein.

  FIG. 2 schematically shows the main components in the present embodiment. The first substrate 101 disposed in the first housing 201 is configured by, for example, a printed circuit board having a thickness of 1 mm, and the dimension is set to 70 mm in length and 40 mm in width. A ground pattern is formed on the first substrate 101. The second substrate 102 disposed in the second housing 202 is configured by, for example, a printed circuit board having a thickness of 1 mm, and the dimension is set to 70 mm in length and 40 mm in width. Similarly to the first substrate 101, a ground pattern is formed on the second substrate 102, and this ground pattern operates as a ground conductor for the antenna.

    The connecting portion 13 includes a planar connection member whose exterior portion is made of a flexible polymer material or the like, and the short side portions of the rectangular first casing 11 and second casing 12 are machined. Connected. When the connecting portion 13 is bent, the first housing and the second housing can be folded so as to be opened and closed. That is, the first casing 11 and the second casing 12 are separated from each other as shown in FIG. 2, and the first casing 11 and the second casing are separated as shown in FIGS. It can be opened and closed with the first state where the body 12 overlaps (the first housing 11, the second housing 12, and the connecting portion 13 are not shown). The connecting portion 13 formed of the planar connection member can be bent, but the bending here may include bending, bending, and other deformations.

  A connecting element 103 is provided in the connecting portion 13 substantially along the planar connecting member. The connection element 103 is composed of a flexible pattern having a thickness of 0.1 mm, for example, and electrically connects the first substrate 101 and the second substrate 102. The dimensions are set to 40 mm long and 5 mm wide.

  The antenna element 104 is composed of a conductive wire having a diameter of 1 mm, for example, and is disposed substantially along the planar connection member between the first substrate and the second substrate. The antenna element 104 is composed of a conductor having a length of about ¼ wavelength in the 800 MHz band used in the terrestrial cellular system, and is set to have a total length of about 90 mm, for example.

  A wireless circuit portion 108 is provided over the second substrate 101. The radio circuit unit 108 is connected to the switching unit 109 via a feeder line.

  The switching unit 109 switches the matching circuits 110, 111, and 112 connected between the radio circuit unit 108 and the antenna element 104, and operates based on an output signal of the output unit 107 described later. That is, the switching unit 109 connects any one of the matching circuits 110, 111, and 112 between the wireless circuit unit 108 and the antenna element 104.

  The matching circuits 110, 111, and 112 are each directly connected to the antenna element 104 through the feeder line 113. Each matching circuit 110, 111, 112 has different matching characteristics.

  The connection element 103, the antenna element 104, and the feeder line 113 are disposed substantially along the planar connection member of the connecting portion 13, but the disposed side may be the inner surface side when folded or the outer surface side. Moreover, the state embedded in the planar connection member is also included in the substantially aligned arrangement.

  The first detection sheet metal 105 disposed on the first substrate 101 is made of a metal conductor and is disposed on the first substrate. In that case, the size is set to about 10 × 10 mm. The first detection sheet metal 105 is disposed in a region adjacent to the connecting portion 13 of the first substrate 101. And the 1st detection sheet metal 105 will be in the state which overlapped with the 2nd detection sheet metal 106 arrange | positioned on a 2nd board | substrate on the Y-axis in the state which the folding portable radio | wireless machine in this embodiment closed.

  The second detection sheet metal 106 disposed on the second substrate 102 is made of a metal conductor like the first detection sheet metal 105, and the size is set to about 12 × 12 mm. The second detection sheet metal 106 is disposed in a region adjacent to the connecting portion 13 of the second substrate 102. The first detection sheet metal 105, the second detection sheet metal 106, and the output unit 107 include a first case and a second case including the overlapping state of the first case 11 and the second case 12. The detection part which detects the relative positional relationship of this and outputs the state output signal according to relative positional relationship is comprised.

  The first detection sheet metal 105 and the second detection sheet metal 106 are connected to the output unit 107 via wirings 114 and 115, respectively. The output unit 107 is set on the second substrate. The output unit 107 detects the inter-plate capacitance between the first detection sheet metal and the second detection sheet metal based on the potential difference between the wires 114 and 115, and switches the state output signal according to the detected capacitance value. Output to 109.

  As shown in FIG. 2, when the portable wireless device is opened, the interplate capacitance between the first detection sheet metal 105 and the second detection sheet metal 106 is substantially zero. In this case, the output unit 107 outputs a state output signal indicating that the portable wireless device is in the open state.

  At this time, the switching unit 109 connects the matching circuit 110 between the wireless circuit unit 108 and the antenna element 104. The matching circuit 110 is configured by a circuit network that connects the wireless circuit unit 108 and the antenna element 104 with 50Ω in a state where the folding portable wireless device according to the present embodiment is opened. Thereby, mismatch loss between the radio circuit unit 108 and the antenna element 104 can be minimized.

  FIG. 3 shows a front view of a state in which the folding portable wireless device according to the present embodiment is closed. The illustration of the first housing 11, the second housing 12, and the connecting portion 13 is omitted. FIG. 3 shows a state where the first substrate and the second substrate are completely overlapped on the XZ plane in the closed state. This state is referred to as (A). The state (A) is a state in which the first detection sheet metal 105 and the second detection sheet metal 106 are completely overlapped on the Y-axis, and the space between the first detection sheet metal 105 and the second detection sheet metal 106 is between The capacitance is a predetermined value.

  In this case, the output unit 107 outputs a state output signal indicating that the portable wireless device is in the state (A) (matched closed state). At this time, the switching unit 109 connects the matching circuit 111 between the wireless circuit unit 108 and the antenna element 104.

  The matching circuit 111 is configured by a circuit network that connects the wireless circuit unit 108 and the antenna element 104 with 50Ω when the portable wireless device is in the (A) state (matching closed state). Thereby, mismatch loss between the radio circuit unit 108 and the antenna element 104 can be minimized.

  In the foldable portable wireless device according to the present embodiment, the connecting portion 13 including a planar connecting member that bends is used for the structure that realizes opening and closing of the housing, and the connecting portion 13 has flexibility, and thus has an external force. As a result, the connecting portion 13 is temporarily deformed such as bent or bent, and the first housing and the second housing are in the plane (XZ) from the completely overlapped state as shown in FIG. Surface). That is, it is difficult to hold the first substrate 101 and the second substrate 102 in a completely constant state, and the positional relationship between the first substrate 101 and the second substrate 102 changes as shown in FIG. . Then, the relative positional relationship between the antenna element 104 and the second substrate 102 serving as the ground changes, and the antenna characteristics change. 3 and 4 (and FIGS. 7 and 8 to be described later) are schematic diagrams, and the state where the antenna element 104 is moved is omitted.

  FIG. 4 is a front view showing a state in which the connecting portion 13 of the folding portable wireless device according to this embodiment is deformed. The illustration of the first housing 11, the second housing 12, and the connecting portion 13 is omitted. FIG. 4 shows a state in which the first substrate 101 is rotated at an arbitrary angle clockwise in the XZ plane with respect to the second substrate 102 in the closed state.

  A state in which the first substrate 101 is rotated by an arbitrary angle clockwise in the XZ plane with respect to the second substrate 102 is referred to as a state (B) (misalignment closed state). The same applies when the second substrate 102 rotates counterclockwise at an arbitrary angle in the XZ plane with respect to the first substrate 101.

  In the state of (B) where the first detection sheet metal 105 and the second detection sheet metal 106 partially overlap each other on the Y-axis, the inter-plate capacitance between the first detection sheet metal 105 and the second detection sheet metal 106. Becomes a small value compared with the state of (A). In this case, the output unit 107 outputs a state output signal indicating that the portable wireless device is in the state (B) (mismatched closed state). At this time, the switching unit 107 connects the matching circuit 112 between the wireless circuit unit 108 and the antenna element 104. The matching circuit 112 is configured by a circuit network that minimizes mismatch loss between the wireless circuit unit 108 and the antenna element 104 when the portable wireless device is in the state (B).

  As described above, by changing the characteristics of the matching circuit connected between the radio circuit unit 108 and the antenna element 104 in accordance with the state of the casing including the overlapping state of the casings, it is possible to realize good antenna characteristics. it can.

  FIG. 5 shows the frequency characteristics of the VSWR (voltage standing wave ratio) in the states (A) and (B) of the folding portable wireless device of this embodiment. A solid line 401 and a chain line 403 are characteristics when the matching circuit 111 is connected in the state (A) and when the matching circuit 112 is connected in the state (B), respectively. Note that the characteristics when the matching circuit 111 is connected in the state of (B) are indicated by dotted lines 402 for comparison.

  VSWR is an index for evaluating the matching state between the radio circuit unit 108 and the antenna element 104, and 1 is the most ideal state. In a design in a normal wireless device, VSWR <2 is set at a desired frequency. The mismatch loss when VSWR is 2 is about 0.5 dB.

  In the example of FIG. 5, the VSWR of the solid line 401 at a desired frequency of 900 MHz is about 2. On the other hand, the dotted line 402 has a VSWR of about 6 at 900 MHz. This is because the positional relationship between the first substrate and the antenna element 104 changes, and the resonance frequency changes to a low frequency due to the antenna element 104 being affected by the proximity of metal.

  The mismatch loss when the VSWR is 6 is about 3.0 dB, and when the switching of the matching circuit is not performed, the antenna gain is deteriorated at about 2.5 dB at the desired frequency of 900 MHz.

  That is, when switching to the matching circuit 112 in the state of (B), the VSWR at 900 MHz is 3 and the mismatch loss is about 1 dB as shown by the alternate long and short dash line 403. About 0.5 dB antenna gain. However, the antenna gain is improved by about 2 dB compared to the case where the matching circuit is not switched.

  Note that the shape and arrangement position of the detection sheet metal are not limited to those in the description of the present embodiment, and may be arranged, for example, at the tip of a portable wireless device or at the substrate end. In addition, the same effect can be obtained with any configuration as long as both sheet metals overlap in a closed state.

(Second Embodiment)
A foldable portable wireless device according to a second embodiment will be described with reference to FIGS.

  FIG. 6 shows a front view of the folding portable wireless device in the open state in the first embodiment. In the second embodiment, the configuration of the detection portion in the first embodiment is partially changed.

  In FIG. 6, those denoted by the same reference numerals as those in FIG.

  The first detection element 501 is composed of, for example, a magnet having a polarity, and the size is set to 4 × 2 mm. Further, the first signal output element 502 is constituted by, for example, a Hall element, and is disposed at a position on the second substrate that overlaps with the first detection element 501 in a closed state. That is, the first sensing element 501 is disposed in a region adjacent to the connecting portion 13 of the first substrate 101, and the first signal output element 502 is disposed in a region adjacent to the connecting portion 13 of the second substrate 102. Has been placed. The Hall element outputs a signal corresponding to the strength of the magnetic force, and has a size of about 3 × 2 mm.

  The second sensing element 503 is composed of a magnet having a polarity like the first sensing element 501, and the size is set to 4 × 2 mm. The first detection element 501 and the second detection element 503 are respectively arranged at positions where the distance can be set most on the Z axis on the first substrate.

  In addition, the second signal output element 504 is configured by a Hall element, for example, and is disposed at a position on the second substrate that overlaps with the second detection element 503 in the closed state. That is, the second sensing element 503 is disposed at the end of the substrate opposite to the end adjacent to the connecting portion 13 of the first substrate 101, and the second signal output element 504 is connected to the second substrate 102. It is arranged at the end of the substrate opposite to the end adjacent to the connecting portion 13. The Hall element is a detector that detects the presence or absence of magnetic force, and has a size of about 3 × 2 mm. The first signal output element 502 and the second signal output element 504 are connected to the output unit 107, and state output is performed based on the output results (output signals) of the first signal output element 502 and the second signal output element 504. Output a signal.

  In the state where the folding portable wireless device in the present embodiment shown in FIG. 6 is opened, the first signal output element 502 and the second signal output element 504 do not detect the detection element, and the output unit 107 The wireless circuit unit 108 and the antenna element 104 are connected via the matching circuit 110. The first detection element 501, the first signal output element 502, the second detection element 503, the second signal output element 504, and the output unit 107 constitute a detection unit.

  FIG. 7 shows a front view of the foldable portable wireless device according to the present embodiment in a closed state. The illustration of the first housing 11, the second housing 12, and the connecting portion 13 is omitted. FIG. 7 shows a state where the first substrate and the second substrate are completely overlapped on the XZ plane in the closed state. This state is referred to as a state (C) (alignment closed state).

  The state (C) is a state in which the first detection element 501 and the first signal output element 502 are completely overlapped on the Y axis, and the first signal output element 502 detects the first detection element 501. be able to. Similarly, the second detection element 503 and the second signal output element 504 are completely overlapped on the Y axis, and the second signal output element 504 can detect the second detection element 503. That is, the state (C) is a state in which the detection elements are detected in both the first signal output element 502 and the second signal output element 504.

  In this case, the output unit 107 outputs a signal to the switching unit 109 so as to connect the wireless circuit unit 108 and the matching circuit 111. In this case, the output unit 107 outputs a state output signal indicating that the portable wireless device is in the state (C) (alignment closed state). At this time, the switching unit 109 connects the matching circuit 111 between the wireless circuit unit 108 and the antenna element 104.

  FIG. 8 is a front view showing a state in which the connecting portion 13 of the folding portable wireless device according to this embodiment is deformed. The illustration of the first housing 11, the second housing 12, and the connecting portion 13 is omitted. FIG. 8 shows a state in which the first substrate 101 is rotated by an arbitrary angle clockwise in the XZ plane with respect to the second substrate 102 in the closed state. This state is defined as (D).

    The state (D) is a state in which the first detection element 501 and the first signal output element 502 partially overlap on the Y axis, and the first signal output element 502 detects the first detection element 501. be able to. Similarly, the second detection element 503 and the second signal output element 504 do not overlap with each other on the Y axis, and the second signal output element 504 cannot detect the second detection element 503. That is, the state (D) is a state in which the first signal output element 502 detects the first detection element 501 and the second signal output element 504 cannot detect the second detection element 503.

  At this time, the switching unit 107 connects the matching circuit 112 between the wireless circuit unit 108 and the antenna element 104. The matching circuit 112 is configured by a circuit network that minimizes mismatch loss between the wireless circuit unit 108 and the antenna element 104 when the portable wireless device is in the state (D).

  By adopting a combination of a plurality of detection elements and signal output elements in this manner, the detection accuracy with respect to the holding state position change can be improved.

  Therefore, the effect of the foldable portable radio device according to the present embodiment is to provide a plurality of combinations of detection elements and signal output elements, thereby improving detection accuracy in the open state, the aligned closed state, and the mismatched closed state. Even when the holding state changes, good antenna performance can be realized. In particular, in the present embodiment, one combination (first detection element and first signal output element) is formed in a region adjacent to the connecting portion 13 of both substrates 101 and 102, and the other combination (second detection element). And the second signal output element) are formed at the end of the substrate opposite to the end adjacent to the connecting portion 13 of both the substrates 101 and 102, and are formed at locations far from each other. Can be improved.

  Note that the detection unit is not limited to the configuration of the above-described embodiment, and the same effect can be obtained regardless of the configuration as long as it can detect the specific closed state of the folding portable wireless device. Various other switches, circuits, mechanical mechanisms, and the like can be used for the detection unit.

  In the above-described embodiment, the first casing is the upper casing and the second casing is the lower casing, but the first casing is the lower casing and the second casing. May be an upper housing.

  Further, the detection unit, the radio circuit unit, the switching unit, and the matching circuit are not limited to specific ones, and various circuits can be used as long as they fulfill their functions.

  Further, the length and shape of the antenna element are not limited to the above-described configuration, and may be a helical structure, for example, or may be a configuration built in a dielectric. Moreover, in the said embodiment, although the antenna element was arrange | positioned in the planar connection member, you may arrange | position in a housing | casing. Furthermore, even in a frequency band other than the 800 MHz band used in the terrestrial cellular mobile communication system, the same effect can be obtained by adjusting the electrical length if the configuration is the same as that of the present embodiment.

  Although various embodiments of the present invention have been described above, the present invention is not limited to the matters shown in the above-described embodiments, and those skilled in the art will be able to understand based on the claims and the description of the specification and well-known techniques. Such changes and applications are also within the scope of the present invention, and are included in the scope for which protection is sought.

  As described above, according to the foldable portable wireless device according to the present invention, even when the holding state is changed by switching the matching circuit in the open state, the matching closed state, and the mismatching closed state, it is good. The antenna performance can be realized, and in particular, the performance improvement of the carrying state in the mobile phone can be expected.

Perspective view of foldable portable radio The front view in the open state of the foldable portable radio | wireless machine of 1st Embodiment Front view of the folding portable wireless device according to the first embodiment in a normally closed state The front view in the specific closed state of the foldable portable radio of a 1st embodiment The graph which shows the frequency characteristic of VSWR in the closed state of the foldable portable radio | wireless machine of 1st Embodiment The front view in the open state of the foldable portable radio | wireless machine of 2nd Embodiment Front view of the folding portable wireless device according to the second embodiment in a normally closed state The front view in the specific closed state of the foldable portable radio of a 2nd embodiment

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 1st housing | casing 12 2nd housing | casing 13 Connection part 101 1st board | substrate 102 2nd board | substrate 103 Connection element 104 Antenna element 105 1st detection sheet metal 106 2nd detection sheet metal 107 Output part 108 Wireless circuit part 109 Switching unit 110 Matching circuit 111 Matching circuit 112 Matching circuit 401 Solid line 402 indicating frequency characteristics of VSWR in the state of (A) 402 Frequency of VSWR in the state of broken line 403 showing the frequency characteristics of VSWR in the state of (B) Dotted line 501 indicating characteristics First detection element 502 First signal output element 503 Second detection element 504 Second signal output element

Claims (6)

A first housing;
A second housing;
A first circuit board disposed in the first housing;
A second circuit board disposed in the second housing;
A first state in which the first casing and the second casing are mechanically connected, and the first casing and the second casing are overlapped; and the first casing And a planar connecting member that can be bent so as to be opened and closed to a second state in which the second housing is separated from the second housing;
A flexible connection conductor disposed substantially along the planar connection member and electrically connecting the first circuit board and the second circuit board;
A radio circuit unit provided on the second circuit board;
An antenna disposed substantially along the planar connection member and connected to the radio circuit unit via a feeder line;
A plurality of matching circuits selectively connected between the radio circuit unit and the antenna;
A detection unit that outputs a state output signal according to an overlapping state of at least the first housing and the second housing in the first state;
A foldable portable wireless device comprising: a switching unit that switches the matching circuit connected between the radio circuit unit and the antenna based on a state output signal of the detection unit. The planar connecting member is deformed,
The folding portable wireless device according to claim 1, wherein an overlapping state of the first casing and the second casing is changed by deformation of the planar connection member. The detection unit includes a first detection sheet metal disposed on a first circuit board, and a second detection sheet metal disposed on the second circuit board,
The folding type according to any one of claims 1 and 2, wherein the state output signal is output based on a capacitance between the first detection sheet metal and the second detection sheet metal. Portable radio.   The first detection sheet metal is disposed in a region adjacent to the planar connection member of the first circuit board, and the second detection sheet metal is adjacent to the planar connection member of the second circuit board. The foldable portable wireless device according to claim 3, wherein the foldable portable wireless device is disposed in the region. The detection unit is
A first sensing element and a second sensing element disposed on the first circuit board;
A first signal output element and a second signal output element which are disposed on the second circuit board and output a signal corresponding to a relative position between the first detection element and the second detection element; ,
The foldable portable wireless device according to claim 1, wherein the state output signal is output based on outputs of the first signal output element and the second signal output element. . The first sensing element is disposed in a region adjacent to the on-surface connection member of the first circuit board;
The second sensing element is disposed at an end of the first circuit board opposite to the end adjacent to the planar connection member;
The first signal output element is disposed in a region adjacent to the planar connection member of the second circuit board;
The foldable portable wireless device according to claim 5, wherein the second signal output element is disposed at an end of the second circuit board opposite to the end adjacent to the planar connection member.

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